Nissan Chemical Industries Limited

Masanori Ota

Masashi Nakamura

Kenichi Mizusawa

Hitoshi Sasahara

Tokuyuki Taniguchi

Takashi Kamiyama

Toshiki Mori

Kumi Kasahara

Iwao Yashima

Masafumi Aoki

A method for bleaching a cloth dyed with an indigo dye by using a processing solution containing a bleaching agent, wherein said processing solution is an aqueous solution of a dichloroisocyanuric acid salt, is disclosed. According to the invention, the degree of bleaching can be easily controlled and, after the bleaching, neither yellowing nor deterioration of fibers occurs.

Method for bleaching cloths

Chloroisocyanurate compositions for disinfection and sterilization comprise a dichloroisocynurate and at least one alkaline substance selected from the group consisting of magnesium oxide, magnesium hydroxide, calcium hydroxide and sodium carbonate. The chloroisocyanurate compositions can prevent an increase in hydrogen ion concentration often caused by continuous use of dichloroisocyanurates in closed water systems and have excellent stability in a wet state and stability during storage over long periods of time.

Chloroisocyanurate composition

The present invention relates to a chloroisocyanuric acid composition having stability during storage characterized by formulating, as a main component, 1 to 200 parts by weight of at least one aluminum sulfate selected from aluminum sulfate (Al.sub.2 (SO.sub.4).sub.3.XH.sub.2 O, X=0 to 18), potassium alum (KAl(SO.sub.4).sub.2.XH.sub.2 O, X=0 to 12) and sodium alum (NaAl(SO.sub.4).sub.2.XH.sub.2 O, X=0 to 12) in 100 parts by weight of trichloroisocyanuric acid and/or dichloroisocyanuric acid.

Chloroisocyanuric acid composition having storage stability

Solid chlorinating agents can be stored highly stably and safely in a closed system for a long period of time without discoloring or deterioration, when a storage stabilizer of alumino-silica gel obtained from allophane incorporated with active carbon is placed in the ambient atmosphere enclosing the chlorinating agents, preferably not in direct contact with the agents. In addition, the agents do not cause damages on the surface and material of, or breakdown of, the container constituting the closed system, and no offensive odor is generated upon opening even after a prolonged storage.

Method of storing a solid chlorinating agent

Fungi growing on a hide are removed by immersing the hide in an aqueous solution of chlorinated isocyanuric acid or salt in a solution of chlorinated isocyanuric acid or salt in a halogenide of an aliphatic hydrocarbon having one to three carbon atoms or in a ketone or ester represented by the general formula: ##STR1## (wherein, R.sub.1 denotes an alkyl group having one to three carbon atoms and R.sub.2 an alkyl group or alkoxy group having one to three carbon atoms).

Method for removal of fungi formed on hides

A method of storing a solid chlorinating agent with improved storage performance involving placing the solid chlorinating agent and a storage stabilizer such as calcium oxide, trisodium phosphate, magnesium oxide, ferrous oxide, melamine, ammeline or ammelide in a closed container in a manner that the stabilizer contacts the noxious gases in the same container but not with the solid chlorinating agent in the same container. An article for storing the same is composed of a closed container in which the solid chlorinating agent is placed together with the storage stabilizer in such a manner that the gases are brought into contact with the storage stabilizer.

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Funabashi, Japan

Masanori Ota